This behavior must always be a concern, especially if it evolves the normal increase in weight. You should consult your pediatrician to rule out any disease and, if the baby is healthy, he will give you some advice (avoid excess shelter you numb not to establish a more rigid feeding schedule, etc. .).
Milk intolerance
The baby is too apathetic or irritable. Other symptoms include vomiting, rash, diarrhea or poor weight gain. First one, several or all of these symptoms, the doctor must rule out the possibility of allergy to milk or inborn metabolic disorders. In either case it requires feeding with formula milk adapted special.
Jaundice may persist after birth to 10 and 15 days. When held within that time and the baby breastfeeds, it is very possible that in the case of breast milk jaundice. This disorder is due to the fatty acid content of milk inhibits the normal metabolism of bilirubin. In these cases the urine is clear and there is no blood incompatibility with the mother. Should consult with your pediatrician, but this jaundice is not serious at all. Only in the event that was very intense, feeding should be discontinued a few days but generally not necessary.